Recent content by Lazy

:frown:, sorry, yes, I meant moles of NaCl 7.2 grams. Or what I intended to say, or more accuratley --> 7.2 g/ Molar Mass NaCl.

In regards to your second paragraph, yes. Molar Mass of 7.2 g NaCl / Volume of water in litres. No need to convert NaCl to ml, as molarity is the moles of solute [any solute] within a given volume [usually 1 litre].

Okay, take for instance, a standard Copper/Zinc Galvanic Cell. When you look at the Standard Potential table [which I presume is what you're wondering about], look at the value and see whether if it like to remain as the ion or the solid [which what Redox is]. The more reactive metal, will like...

In order from hardest to softest. 1.) Physics 2.) Chemistry 3.) Biology 4.) Medicine 5.) Economics 6.) Sociology 7.) Psychology

Usually practice paper, you have to buy them if you want a collection of several years and are fairly expensive >$40 AUD. A quick Google search yielded these results : http://www.amt.canberra.edu.au/wuamc.html I'm thinking you'll have to pay for anything more. There aren't any...

The OP did mention lighter elements as well.

Most of these substances that have these "magical" cleaning properties, as you said, are alcohols. Alcohols by definition have a hydroxyl functional group somewhere on them. This hydroxyl group unlike the rest of the molecule is highly polar. Take for instance ethanol, it's got the polar OH on...

I'm not too sure on the details of theory, but yes, "we" have created heavier elements. These lighter or heavier elements are formed through types of radioactive decay such as \alpha and \beta decay. Just a situation where there are not enough neutrons, too many neutrons, too little protons...